title: The suppression of hidden order and the onset of ferromagnetism in URu2Si2 via Re substitution.
abstract: Substitution of Re for Ru in the heavy fermion compound URu(2)Si(2) suppresses the hidden order transition and gives rise to ferromagnetism at higher concentrations. The hidden order transition of URu(2 - x)Re(x)Si(2), tracked via specific heat and electrical resistivity measurements, decreases in temperature and broadens, and is no longer observed for x > 0.1. A critical scaling analysis of the bulk magnetization indicates that the ferromagnetic ordering temperature and ordered moment are suppressed continuously towards zero at a critical concentration of x ≈ 0.15, and this is accompanied by the additional suppression of the critical exponents γ and δ - 1 towards zero. This unusual trend appears to reflect the underlying interplay between Kondo and ferromagnetic interactions, and perhaps the proximity of the hidden order phase.
authors.affiliation: Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, CA 92093, USA.
authors.forename: N P
authors.initials: NP
authors.lastname: Butch
authors.forename: M B
authors.initials: MB
authors.lastname: Maple